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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Before and After Tax Amounts by Component (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Change in unrealized gain or loss on securities: |  |
Change in net unrealized gain (loss) during the period | $ (70,131) | $ (15,534)
Reclassification adjustment for net gains included in net gain on securities and other assets |  | (1,187)
Accretion of net unrealized loss on securities transferred to held to maturity | 170 |
Net change | (69,961) | (16,721)
Tax benefit | (22,002) | (5,329)
Net change in unrealized gain or loss on securities, net of reclassification adjustments and tax | (47,959) | (11,392)
Change in pension and other postretirement obligations: |  |
Reclassification adjustment for expense included in other expense | (934) | (422)
Reclassification adjustment for curtailment loss |  | 1,543
Change in the net actuarial gain or loss | 997 | 885
Net change | 63 | 2,006
Tax expense | 21 | 635
Net change in pension and other postretirement obligations | 42 | 1,371
Change in unrealized gain or loss on derivatives: |  |
Change in net unrealized gain or loss during the period | 6,852 | 4,948
Reclassification adjustment for loss included in loss on termination of derivatives |  | 16,505
Reclassification adjustment for expense included in interest expense | 31 | 854
Net change | 6,883 | 22,307
Tax benefit | 2,165 | 5,831
Net change in unrealized gain or loss on derivatives, net of reclassification adjustments and tax | 4,718 | 16,476
Total other comprehensive (loss) income, net of tax | $ (43,199) | $ 6,455

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